I hope that you don't mind me derailing this a bit more, Beyond. XD;; If you do mind... Draw me as a kitten and eat me. @_@ (I could have deleted this part, but... Eh. ^_^; )
Okay, here's my opinion about "how to" stuff. As far as style goes? That's observational, and you can pick it up for free and practice to capture that style. Otherwise, the best help for any artist is in learning how to use tools, knowing how they can be used, and to what effects. That's something that is necessary (even for a simple tool, such as a pencil), and anyone can understand with application. Other than that, no one but yourself can improve your work insofar as having the skill to transfer an intended outcome from your mind and through your hands (usually ;p) while using said tools. Lots of trial and error (usually), to be sure.
For instance, I'm accustomed to using automatic pencils on paper, not non-ball-point pens on a plastic surface that's one-fifth of the size of the screen that it effects. Essentially, I've been having to learn to glide a different material for a tip on a different surface using one-fifth of the usual movement without the elbow support I'm also accustomed to having. X_X I don't do too bad otherwise, seeing as I have little experience with other tools outside of standard pencils and pens. However, I did get in a lot of practice with pencils and pens a while back, with and without reference material. So I tend to do better with that... Same with cartoon animals, since much of my practice (a long time ago) included characters in the Sonic the Hedgehog universe, as well as Looney Tunes and other such stuff.
And stuff. Learning techniques for using tools is the easy part. The rest just takes practice, which includes keeping focus on what it is that you want to draw. Focus is something that I severely lack in...